1 /* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
2 Copyright (C) 1991, 1993 Free Software Foundation, Inc.
3 Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
5 This file is part of GNU ld.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 #define DONTDECLARE_MALLOC
46 lang_memory_region_type *region;
50 boolean ldgram_want_filename = true;
51 boolean had_script = false;
52 boolean force_make_executable = false;
54 boolean ldgram_in_script = false;
55 boolean ldgram_had_equals = false;
58 #define ERROR_NAME_MAX 20
59 static char *error_names[ERROR_NAME_MAX];
60 static int error_index;
61 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
62 #define POP_ERROR() error_index--;
68 union etree_union *etree;
71 %type <etree> exp opt_exp_with_type mustbe_exp opt_at
72 %type <integer> fill_opt
73 %type <name> memspec_opt
76 %type <integer> length
78 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
79 %right <token> '?' ':'
86 %left <token> '<' '>' LE GE
87 %left <token> LSHIFT RSHIFT
90 %left <token> '*' '/' '%'
95 %token <token> ALIGN_K BLOCK QUAD LONG SHORT BYTE
98 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
101 %token MEMORY DEFSYMEND
102 %token NOLOAD DSECT COPY INFO OVERLAY
103 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
104 %token <integer> SIZEOF NEXT ADDR
105 %token STARTUP HLL SYSLIB FLOAT NOFLOAT
107 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
109 %type <token> assign_op
110 %type <name> filename
111 %token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD
112 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL
113 %token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM
118 INPUT_SCRIPT script_file
119 | INPUT_MRI_SCRIPT mri_script_file
120 | INPUT_DEFSYM defsym_expr
132 lang_add_assignment(exp_assop($3,$2,$4));
135 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
137 { ldlex_mri_script();
138 PUSH_ERROR("MRI style script");
147 mri_script_lines mri_script_command NEWLINE
155 einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
159 config.map_filename = "-";
161 | ORDER ordernamelist
163 | PUBLIC NAME '=' exp
164 { mri_public($2, $4); }
165 | PUBLIC NAME ',' exp
166 { mri_public($2, $4); }
168 { mri_public($2, $3); }
172 { mri_output_section($2, $4);}
174 { mri_output_section($2, $3);}
176 { mri_output_section($2, $4);}
177 | ALIGN_K NAME '=' exp
178 { mri_align($2,$4); }
179 | ALIGNMOD NAME '=' exp
180 { mri_alignmod($2,$4); }
181 | ABSOLUTE mri_abs_name_list
182 | LOAD mri_load_name_list
185 | ALIAS NAME ',' NAME
186 { mri_alias($2,$4,0);}
188 { mri_alias($2,0,(int) $4);}
192 { mri_truncate((unsigned int) $2); }
197 ordernamelist ',' NAME { mri_order($3); }
198 | ordernamelist NAME { mri_order($2); }
205 | mri_load_name_list ',' NAME { mri_load($3); }
210 { mri_only_load($1); }
211 | mri_abs_name_list ',' NAME
212 { mri_only_load($3); }
239 | floating_point_support
242 | TARGET_K '(' NAME ')'
243 { lang_add_target($3); }
244 | SEARCH_DIR '(' filename ')'
245 { ldfile_add_library_path($3); }
246 | OUTPUT '(' filename ')'
247 { lang_add_output($3, 1); }
248 | OUTPUT_FORMAT '(' NAME ')'
249 { lang_add_output_format($3, 1); }
250 | OUTPUT_ARCH '(' NAME ')'
251 { ldfile_set_output_arch($3); }
252 | FORCE_COMMON_ALLOCATION
253 { command_line.force_common_definition = true ; }
254 | INPUT '(' input_list ')'
255 | MAP '(' filename ')'
256 { lang_add_map($3); }
258 { ldfile_open_command_file($2); } ifile_list END
263 { lang_add_input_file($1,lang_input_file_is_search_file_enum,
265 | input_list ',' NAME
266 { lang_add_input_file($3,lang_input_file_is_search_file_enum,
269 { lang_add_input_file($2,lang_input_file_is_search_file_enum,
274 SECTIONS '{' sec_or_group_p1 '}'
278 sec_or_group_p1 section
279 | sec_or_group_p1 statement_anywhere
285 { lang_add_entry($3); }
291 { lang_add_wild($1, current_file); }
292 | file_NAME_list opt_comma NAME
293 { lang_add_wild($3, current_file); }
299 lang_add_wild((char *)NULL, $1);
303 current_file = (char *)NULL;
311 '(' file_NAME_list ')'
314 current_file = (char *)NULL;
316 '(' file_NAME_list ')'
321 | CREATE_OBJECT_SYMBOLS
323 lang_add_attribute(lang_object_symbols_statement_enum);
329 lang_add_attribute(lang_constructors_statement_enum);
334 lang_add_data((int) $1,$3);
340 (exp_get_value_int($3,
343 lang_first_phase_enum));
348 statement_list statement
371 $$ = exp_get_value_int($2,
374 lang_first_phase_enum);
408 lang_add_assignment(exp_assop($2,$1,$3));
410 | NAME assign_op mustbe_exp
413 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
424 MEMORY '{' memory_spec memory_spec_list '}'
428 memory_spec_list memory_spec
429 | memory_spec_list ',' memory_spec
435 { region = lang_memory_region_lookup($1); }
437 origin_spec opt_comma length_spec
440 ORIGIN '=' mustbe_exp
443 exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
446 LENGTH '=' mustbe_exp
447 { region->length = exp_get_vma($3,
450 lang_first_phase_enum);
457 lang_set_flags(®ion->flags, $2);
464 STARTUP '(' filename ')'
465 { lang_startup($3); }
469 HLL '(' high_level_library_NAME_list ')'
471 { ldemul_hll((char *)NULL); }
474 high_level_library_NAME_list:
475 high_level_library_NAME_list opt_comma filename
483 SYSLIB '(' low_level_library_NAME_list ')'
484 ; low_level_library_NAME_list:
485 low_level_library_NAME_list opt_comma filename
486 { ldemul_syslib($3); }
490 floating_point_support:
492 { lang_float(true); }
494 { lang_float(false); }
498 mustbe_exp: { ldlex_expression(); }
500 { ldlex_popstate(); $$=$2;}
505 { $$ = exp_unop('-', $2); }
508 | NEXT '(' exp ')' %prec UNARY
509 { $$ = exp_unop((int) $1,$3); }
510 | '!' exp %prec UNARY
511 { $$ = exp_unop('!', $2); }
512 | '+' exp %prec UNARY
514 | '~' exp %prec UNARY
515 { $$ = exp_unop('~', $2);}
518 { $$ = exp_binop('*', $1, $3); }
520 { $$ = exp_binop('/', $1, $3); }
522 { $$ = exp_binop('%', $1, $3); }
524 { $$ = exp_binop('+', $1, $3); }
526 { $$ = exp_binop('-' , $1, $3); }
528 { $$ = exp_binop(LSHIFT , $1, $3); }
530 { $$ = exp_binop(RSHIFT , $1, $3); }
532 { $$ = exp_binop(EQ , $1, $3); }
534 { $$ = exp_binop(NE , $1, $3); }
536 { $$ = exp_binop(LE , $1, $3); }
538 { $$ = exp_binop(GE , $1, $3); }
540 { $$ = exp_binop('<' , $1, $3); }
542 { $$ = exp_binop('>' , $1, $3); }
544 { $$ = exp_binop('&' , $1, $3); }
546 { $$ = exp_binop('^' , $1, $3); }
548 { $$ = exp_binop('|' , $1, $3); }
549 | exp '?' exp ':' exp
550 { $$ = exp_trinop('?' , $1, $3, $5); }
552 { $$ = exp_binop(ANDAND , $1, $3); }
554 { $$ = exp_binop(OROR , $1, $3); }
555 | DEFINED '(' NAME ')'
556 { $$ = exp_nameop(DEFINED, $3); }
558 { $$ = exp_intop($1); }
560 { $$ = exp_nameop(SIZEOF_HEADERS,0); }
562 | SIZEOF '(' NAME ')'
563 { $$ = exp_nameop(SIZEOF,$3); }
565 { $$ = exp_nameop(ADDR,$3); }
566 | ABSOLUTE '(' exp ')'
567 { $$ = exp_unop(ABSOLUTE, $3); }
568 | ALIGN_K '(' exp ')'
569 { $$ = exp_unop(ALIGN_K,$3); }
571 { $$ = exp_nameop(NAME,$1); }
576 AT '(' exp ')' { $$ = $3; }
580 section: NAME { ldlex_expression(); }
582 opt_at { ldlex_popstate(); }
585 lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
588 '}' {ldlex_expression();} fill_opt memspec_opt
591 lang_leave_output_section_statement($11, $12);
598 NOLOAD { typebits = SEC_NEVER_LOAD; }
599 | DSECT { typebits = 0; }
600 | COPY { typebits = 0; }
601 | INFO { typebits = 0; }
602 | OVERLAY { typebits = 0; }
603 | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
608 exp ':' { $$ = $1; typebits =0;}
609 | exp '(' type ')' ':' { $$ = $1; }
610 | ':' { $$= (etree_type *)NULL; typebits = 0; }
611 | '(' type ')' ':' { $$= (etree_type *)NULL; }
617 | { $$ = "*default*"; }
624 if (error_index > 0 && error_index < ERROR_NAME_MAX)
625 einfo("%P%F: %S %s in %s\n", arg, error_names[error_index-1]);
627 einfo("%P%F: %S %s\n", arg);